This tire isn't designed to replace the RE050s or substitute for a set of winter tires without compromise. Face it, they're above average all-seasons. They are not as grippy in the summer and don't do quite as good as Blizzaks (or similar) in the winter, but for the price point and performance, they work well. For an MS6 owner looking to stay on one set of tires (which I don't recommend, but to each his own), they fit nicely for all year performance. Living in MI and running these year round until I bought a second set of wheels & tires, they performed fine and I wasn't disappointed with them one bit.
That said, when they do wear out, I will be going to dedicated winter tires, but that's not a bad thing against the Pirellis. Also, compared to tires like the Yoko YK520, these outperform those by a mile.